Monday, 29 March 2010

For Bob in Seattle?

Hi Bob (not sure which post you put your comment on so you have a post all of your very own!)

Way back in the beginning when they make the steel hull there are angle irons sticking up from the floor and out from the sides of the hull as well as down from the ceiling.  They are part of the strengthening process as well as necessary for the fit out.  You have to know where you are going to put portholes/windows/hatches/chimneys and vents etc as you don't want to find out later that you have to go through welds and extra thickness beams!

These then have wooden battens attached (so you don't have to drill into the hull itself - no risk of holes under the waterline - a useful feature I find).  In between the battens on the side and ceiling you fit the insulation.  In my case I had it sprayfoamed but there are other ways.  Some run their electrics and pipes at this stage before covering with the panels.

The floor bearers have the ballast fitted between them then the subfloor.  I wanted to have extra thickness base plate but was talked out of it.  I wish I had stuck to my guns as due to a mathematical cock up on my part I am now underballasted (and have spare bricks with nowhere to go) so have had to buy iron weights to place strategically around the boat!

There should be pictures of the progress back at the shell building stage.

Hope that helps.

2 comments:

Robert Salnick said...

My own personal post - now that is a first for me.

Thanks so much for the information - it entirely makes sense. And it is all in line with those long-ago pix from when NB Bobcat was an echoing empty hull.

Yes, it is too bad, isn't it, that the iron you now need to buy couldn't have been the extra thickness in the baseplate. It would have left you with more room under the floorboards.

Those bricks look pretty light - could you find some granite pavers, or some used kiln brick? Either would be much, much denser.

Bob
s/vEolian
Seattle

nb.bobcat said...

The bricks are engineering bricks believe it or not weighing 2kg each. I forgot to allow for those cross bearers! Hence having bricks left over but not enough ballast. We live and learn.

With hindsight I should have got the 3kg ones and then I could have done clever things like keep wine in the bilges.

(Still in the bottles not flowing loose)